
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Azure OpenAI Real-Time Chat</title>
    <style>
        body {
            font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, sans-serif;
            background-color: #0a0a0a;
            color: #ffffff;
            margin: 0;
            padding: 20px;
            height: 100vh;
            box-sizing: border-box;
        }
        .container {
            max-width: 800px;
            margin: 0 auto;
            height: calc(100% - 100px);
        }
        .logo {
            text-align: center;
            margin-bottom: 40px;
        }
        .chat-container {
            border: 1px solid #333;
            padding: 20px;
            height: 90%;
            box-sizing: border-box;
            display: flex;
            flex-direction: column;
        }
        .chat-messages {
            flex-grow: 1;
            overflow-y: auto;
            margin-bottom: 20px;
            padding: 10px;
        }
        .message {
            margin-bottom: 20px;
            padding: 12px;
            border-radius: 4px;
            font-size: 16px;
            line-height: 1.5;
        }
        .message.user {
            background-color: #1a1a1a;
            margin-left: 20%;
        }
        .message.assistant {
            background-color: #262626;
            margin-right: 20%;
        }
        .controls {
            text-align: center;
            margin-top: 20px;
        }
        button {
            background-color: transparent;
            color: #ffffff;
            border: 1px solid #ffffff;
            padding: 12px 24px;
            font-family: inherit;
            font-size: 16px;
            cursor: pointer;
            transition: all 0.3s;
            text-transform: uppercase;
            letter-spacing: 1px;
        }
        button:hover {
            border-width: 2px;
            transform: scale(1.02);
            box-shadow: 0 0 10px rgba(255, 255, 255, 0.2);
        }
        #audio-output {
            display: none;
        }
        .icon-with-spinner {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            min-width: 180px;
        }
        .spinner {
            width: 20px;
            height: 20px;
            border: 2px solid #ffffff;
            border-top-color: transparent;
            border-radius: 50%;
            animation: spin 1s linear infinite;
            flex-shrink: 0;
        }
        @keyframes spin {
            to {
                transform: rotate(360deg);
            }
        }
        .pulse-container {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            min-width: 180px;
        }
        .pulse-circle {
            width: 20px;
            height: 20px;
            border-radius: 50%;
            background-color: #ffffff;
            opacity: 0.2;
            flex-shrink: 0;
            transform: translateX(-0%) scale(var(--audio-level, 1));
            transition: transform 0.1s ease;
        }
        /* Add styles for toast notifications */
        .toast {
            position: fixed;
            top: 20px;
            left: 50%;
            transform: translateX(-50%);
            padding: 16px 24px;
            border-radius: 4px;
            font-size: 14px;
            z-index: 1000;
            display: none;
            box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
        }
        .toast.error {
            background-color: #f44336;
            color: white;
        }
        .toast.warning {
            background-color: #ffd700;
            color: black;
        }
    </style>
</head>

<body>
    <!-- Add toast element after body opening tag -->
    <div id="error-toast" class="toast"></div>
    <div class="container">
        <div class="logo">
            <h1>OpenAI Real-Time Chat</h1>
        </div>
        <div class="chat-container">
            <div class="chat-messages" id="chat-messages"></div>
        </div>
        <div class="controls">
            <button id="start-button">Start Conversation</button>
        </div>
    </div>
    <audio id="audio-output"></audio>

    <script>
        let peerConnection;
        let webrtc_id;
        const audioOutput = document.getElementById('audio-output');
        const startButton = document.getElementById('start-button');
        const chatMessages = document.getElementById('chat-messages');
        let audioLevel = 0;
        let animationFrame;
        let audioContext, analyser, audioSource;
        function updateButtonState() {
            const button = document.getElementById('start-button');
            if (peerConnection && (peerConnection.connectionState === 'connecting' || peerConnection.connectionState === 'new')) {
                button.innerHTML = `
                    <div class="icon-with-spinner">
                        <div class="spinner"></div>
                        <span>Connecting...</span>
                    </div>
                `;
            } else if (peerConnection && peerConnection.connectionState === 'connected') {
                button.innerHTML = `
                    <div class="pulse-container">
                        <div class="pulse-circle"></div>
                        <span>Stop Conversation</span>
                    </div>
                `;
            } else {
                button.innerHTML = 'Start Conversation';
            }
        }
        function setupAudioVisualization(stream) {
            audioContext = new (window.AudioContext || window.webkitAudioContext)();
            analyser = audioContext.createAnalyser();
            audioSource = audioContext.createMediaStreamSource(stream);
            audioSource.connect(analyser);
            analyser.fftSize = 64;
            const dataArray = new Uint8Array(analyser.frequencyBinCount);
            function updateAudioLevel() {
                analyser.getByteFrequencyData(dataArray);
                const average = Array.from(dataArray).reduce((a, b) => a + b, 0) / dataArray.length;
                audioLevel = average / 255;
                // Update CSS variable instead of rebuilding the button
                const pulseCircle = document.querySelector('.pulse-circle');
                if (pulseCircle) {
                    pulseCircle.style.setProperty('--audio-level', 1 + audioLevel);
                }
                animationFrame = requestAnimationFrame(updateAudioLevel);
            }
            updateAudioLevel();
        }
        function showError(message) {
            const toast = document.getElementById('error-toast');
            toast.textContent = message;
            toast.style.display = 'block';
            // Hide toast after 5 seconds
            setTimeout(() => {
                toast.style.display = 'none';
            }, 5000);
        }
        async function setupWebRTC() {
            isConnecting = true;
            const config = __RTC_CONFIGURATION__;
            peerConnection = new RTCPeerConnection(config);
            const timeoutId = setTimeout(() => {
                const toast = document.getElementById('error-toast');
                toast.textContent = "Connection is taking longer than usual. Are you on a VPN?";
                toast.className = 'toast warning';
                toast.style.display = 'block';
                // Hide warning after 5 seconds
                setTimeout(() => {
                    toast.style.display = 'none';
                }, 5000);
            }, 5000);
            try {
                const stream = await navigator.mediaDevices.getUserMedia({
                    audio: true
                });
                setupAudioVisualization(stream);
                stream.getTracks().forEach(track => {
                    peerConnection.addTrack(track, stream);
                });
                peerConnection.addEventListener('track', (evt) => {
                    if (audioOutput.srcObject !== evt.streams[0]) {
                        audioOutput.srcObject = evt.streams[0];
                        audioOutput.play();
                    }
                });
                const dataChannel = peerConnection.createDataChannel('text');
                dataChannel.onmessage = (event) => {
                    const eventJson = JSON.parse(event.data);
                    if (eventJson.type === "error") {
                        showError(eventJson.message);
                    }
                };
                const offer = await peerConnection.createOffer();
                await peerConnection.setLocalDescription(offer);
                await new Promise((resolve) => {
                    if (peerConnection.iceGatheringState === "complete") {
                        resolve();
                    } else {
                        const checkState = () => {
                            if (peerConnection.iceGatheringState === "complete") {
                                peerConnection.removeEventListener("icegatheringstatechange", checkState);
                                resolve();
                            }
                        };
                        peerConnection.addEventListener("icegatheringstatechange", checkState);
                    }
                });
                peerConnection.addEventListener('connectionstatechange', () => {
                    console.log('connectionstatechange', peerConnection.connectionState);
                    if (peerConnection.connectionState === 'connected') {
                        clearTimeout(timeoutId);
                        const toast = document.getElementById('error-toast');
                        toast.style.display = 'none';
                    }
                    updateButtonState();
                });
                webrtc_id = Math.random().toString(36).substring(7);
                const response = await fetch('/webrtc/offer', {
                    method: 'POST',
                    headers: { 'Content-Type': 'application/json' },
                    body: JSON.stringify({
                        sdp: peerConnection.localDescription.sdp,
                        type: peerConnection.localDescription.type,
                        webrtc_id: webrtc_id
                    })
                });
                const serverResponse = await response.json();
                if (serverResponse.status === 'failed') {
                    showError(serverResponse.meta.error === 'concurrency_limit_reached'
                        ? `Too many connections. Maximum limit is ${serverResponse.meta.limit}`
                        : serverResponse.meta.error);
                    stop();
                    return;
                }
                await peerConnection.setRemoteDescription(serverResponse);
                const eventSource = new EventSource('/outputs?webrtc_id=' + webrtc_id);
                eventSource.addEventListener("output", (event) => {
                    const eventJson = JSON.parse(event.data);
                    addMessage("assistant", eventJson.content);
                });
            } catch (err) {
                clearTimeout(timeoutId);
                console.error('Error setting up WebRTC:', err);
                showError('Failed to establish connection. Please try again.');
                stop();
            }
        }
        function addMessage(role, content) {
            const messageDiv = document.createElement('div');
            messageDiv.classList.add('message', role);
            messageDiv.textContent = content;
            chatMessages.appendChild(messageDiv);
            chatMessages.scrollTop = chatMessages.scrollHeight;
        }
        function stop() {
            if (animationFrame) {
                cancelAnimationFrame(animationFrame);
            }
            if (audioContext) {
                audioContext.close();
                audioContext = null;
                analyser = null;
                audioSource = null;
            }
            if (peerConnection) {
                if (peerConnection.getTransceivers) {
                    peerConnection.getTransceivers().forEach(transceiver => {
                        if (transceiver.stop) {
                            transceiver.stop();
                        }
                    });
                }
                if (peerConnection.getSenders) {
                    peerConnection.getSenders().forEach(sender => {
                        if (sender.track && sender.track.stop) sender.track.stop();
                    });
                }
                console.log('closing');
                peerConnection.close();
            }
            updateButtonState();
            audioLevel = 0;
        }
        startButton.addEventListener('click', () => {
            console.log('clicked');
            console.log(peerConnection, peerConnection?.connectionState);
            if (!peerConnection || peerConnection.connectionState !== 'connected') {
                setupWebRTC();
            } else {
                console.log('stopping');
                stop();
            }
        });
    </script>
</body>

</html>
